Belief that global warming is a serious problem is at its highest level in two-and-half-years, but fewer voters than ever give President Obama positive marks on his handling of this issue.

A new Rasmussen Reports national telephone survey of Likely Voters finds that 64% say global warming is at least a somewhat serious problem, including 30% who say it’s Very Serious. One-in-three voters (33%) believe climate change is not a serious problem, with 14% who feel it’s Not At All Serious. (To see survey question wording, click here.)

The national survey of 1,000 Likely Voters was conducted on January 3-4, 2011 by Rasmussen Reports. The margin of sampling error is +/- 3 percentage points with a 95% level of confidence. Field work for all Rasmussen Reports surveys is conducted by Pulse Opinion Research, LLC. See methodology.

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